Java tutorial
//package com.java2s; /* * Copyright (C) 2015 The Android Open Source Project * Modified 2015 by Johan v. Forstner (modifications are marked with comments) * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ import android.graphics.Color; public class Main { /** * Blend {@code color1} and {@code color2} using the given ratio. * * @param ratio of which to blend. 0.0 will return {@code color1}, 0.5 will give an even blend, * 1.0 will return {@code color2}. */ private static int blendColors(int color1, int color2, float ratio) { final float inverseRatio = 1f - ratio; float a = (Color.alpha(color1) * inverseRatio) + (Color.alpha(color2) * ratio); float r = (Color.red(color1) * inverseRatio) + (Color.red(color2) * ratio); float g = (Color.green(color1) * inverseRatio) + (Color.green(color2) * ratio); float b = (Color.blue(color1) * inverseRatio) + (Color.blue(color2) * ratio); return Color.argb((int) a, (int) r, (int) g, (int) b); } }